Carbureter.



W. RROTHE & E. E. CULP.

` CARBURETER. APPLIGATION FILED P11327, 1911.

1,022,703 n Patented Apr.9,1912.

A," @gamme @centran sfrafrus rearrange orrrCE F. RGTHE, OF EAST 'lly LOUIS, 1LLINOIS, AND E. CUL?, GEST. LOUIS, MSSOU'BI.

CABZBURETEB.

Application flied tebrua-ry 2.77, 1911. Serial lofslll..

To el?, 'whom it may concern Be it known that we, WrLLrAM FL Ro'rHE,

a citizen of the United States, and a resident ot the city of East St. Louis, in the county of St. Clair and State of Illinois, and Enano CULP, a citizen of the United States, and a resident ofthe city of St. Louis and State of Missouri, have invented a new and useful improvement in Carbureters, of whic'hthe following is a specification.

This invention relates to carbureteis and more particularly to those used in connection with internal combustion motors.

lt has for its principal objects to secure a proportional and correlated action of the oil and air valves, to provide for varying the proportional correlation between the air and oil valves, to secure a thorough mixture of the air and vapor, to provide for automatically increasing anddecreasmg the sup ,ny of oil -to suit changes in the speed of 'the motor, and to attain certain other advantages hereinafter more fully appearing.

The invention consists in the parts and in the arrangements and combinations of parts hereinafter described and claimed.

in the accompanying drawing which forros part of this specification and wherein lilrrl symbols refer to like parts wherever they occur,-Figure 1 is a vertical section through a carbureter embodying ourinvention; and-Fig. 2 is a horizontal section -on the line le-2 of Fig. 1.

As .shown in the drawing, the casing or shell ot the carbureter comprises three separable sections; namely, an upper section 1, containing a mixing chamber 1a: an intermediate section Q, containing an air chamber 2u; and a bottom section 3, containing'an oil reservoir or supply chamber 3". `In the bottom of the oil reservoir or chamber 3a is a' passageway "l, which communicates with a supply pipe 5 through a strainer G in asmall` receivingr chamber 7 The passageway 4 is controlled by a valve 8 whose stem f) extends up into the reservoir 3 and has a cork or other suitable float 10 secured thereon by' cross-barsor plates l1'. The 4float is adapted to liftthe valve-8 andthereby close the passageway 4 wlientzlie oil or liquid hydrocar? bon has reached a certain level in the reservoir. B v this arrangement'the generalV supply of oil or hydrocarbon may be`kept in a large gravity tank (not shown) and conducted through the pipe 5; and the li uid in the reservoir 3 is maintained at a su stantially uniform level, as the float rises and falls and closes and opensthe valve 8 upon the rise and fall of the level of the liquid in the reservoir.

Specification of Letters Patent. i I Patented Api". 9, 1912.

` The central portion of the. lower horizon-V tal partition 12 which separates the air chamber 2a from the reservoirl 3a' is depressed, as at 13, to provide 'an oil cup or receptacle. A boss 14 is formed on the bottom of the oil cup -13 and provided with -avertical bore in which the lower end portion of the rod 15 is slidably fitted. The lower portion of the rod 15 1s provided with an axial bore 16 which extends substantially one-half the length of the rod. The lower end of the tubular portion of the rod is adapted to bear against the cross-bar or plate 11 Vwhich connects the float to the valve-stem 9 when the-rod is depressed and .whereby the valve 8 is depressed.

A series of perforations 17 are provided in the tubular portion .16 of the rod'15 adjacent to theboss 14. The-perforations 17 are preferably arranged in two spiral sets startingrv and ending at diametrically opposite points on opposite sides of the tube.. B'y moving the' rod 15 up and down a portion only or the entire series of -perforations 17 may be uncovered above the top edge of the boss 14, as desired. v

i lidably fitted in an opening in the top ot' 'the upper casing, section 1 is a hollow cylindrical member 18 whose lower end portion 19 is providedwith a bore through which the rod 15 is slidably fitted.- The upper end portion of the cylindrical member 18 is screw-threaded to receive a nut or collar 20 which rests on -top of the casing section 1 and supports said member 18. vThe upper portion of theV member 18 is internally screw-threaded to receive a ser wplug Q1 iaving an axial bore in'which the upper end portion of the rod 1li/works. 'A fixed collar or shoulder 22'is provided on the rod 15 land interposed between saidy collar and the bottom portion -19 of the member 18 vis ion a spring 23 which yieldingly holds said The upper partition 24' which' separates Vthe air chamber 2 from the mixing chamber 1a is provided with a central opening and av depending 'annular'portion or tunnel 25 constituting a carbureting chamber Whose lower end portion projects into the oil cup or receptacle 13 and is flared, as 26, oppos itely to the tiare of the upper 'portion of the funnel. Preferably, the llower edge of the funnel 25 AeXtends'to a plane slightly below the top edge of the boss 14; A' lever 27, rpreferably a somewhat resillent flat metal strip or plate, is secured to the cylindrical member 18 and hinged at one end on a -rod 28 extending across the upper casing' section 1. .On the opposite end of the i lever is mounted a valve 29 adapted to close the air inlet opening 30 'for vthe mixing chamber la. In the top of the casing section 1 is. a screw-plug 31 and interposed between the inner end of said screw-plug and valve 29 is-a spring 32. An air intakepipe 33 commun1cates-w1th the air inlet opening 30 for the' mlxlng chamber laand also with the'passageway 34 opening into the air, chamber 2*. vIn order to heat the air before it is taken into the can bureter, the pipe 33'may be extended', in any obvious manner, in proximity to the exhaust manifold or pipe or any portion of the motor which radiates heat sufficient to heat the pipe.

- In the .operation ofl the carburetor, the

.screw-plug 21 is adjusted to position the rod 15s,@ that -theproper number ofthe openings 17 in the tubulaa` portion of said rod are open above the top edge of the boss 14 to yadmit suiiicicnt oil for the combpstible v,mixture fort'he; low speed ot' the'f'motor'.

On yeach suction stroke, of the piston 'of the motor, the air is drawn into the chamber 2a around outside of the funnel or carburet`\ 4g ing chamber 25, thence down int'o the oil cup 13 Where it' takes up'the oil therein, and thence up through the funnel orl carbureting chamber into -the mixing chamberv 1"' and out through the outlet opening 35 which is controlled by a throttle-valve 36 and adapted for connection with the intake of the combustion chamber of the motor.4 In case there is vno oil in the'cup 13 a sue? tion is created by thepiston of the moto'r :,zi and the air which is drawn past the per.-

forations 17 in the tubular portion 16 of the rod 15, and the voil in the reservoir 3a is drawn into said tubular' portion 16 and out through said perforations 1 7 Where it is mixed With the air in the carbureting and mixing chambers. When the thrott1e-valve is opened more fully and the motor is running at a higher speed, the valve 29 is lifted to uncover the air inlet openings 30, and at the same time, the lever 27 is lifted andraises the member 18 and the rod 15 carried thereby.' Hence, more of the perforations 17 are opened above the top edge of the boss 14, admltting a larger quantity of oil into' the carbureting chamber 25 where it ls .taken up by 'theair which passes thereU through, and the mixture is finally com-v pleted in the mixing chamber 1E.

. 'To make it sure that the oil Will rise in the tube 16 to a Sutheient height to out through the perforations 17, a vent opening -or openings, preferablya 'pairof them, are provided at `the top of the tube 16as indicated at 17? in Fig. 1 ot the drawings, By this arrangement a partialV racuum,- is created in the tube upon the suction stroke of the engine piston'and the oil is drawn well up into the tube.

-'By .the construction and arrangement. ot the cylindrical. member 18 on the-lever 27,

'iti

and th correlation of the air valve' 29 and its spring 32, ltogether with` theadjustable screw-,plugs 21. and 31, the tensions-of the L springs 23 and 32 may be adjusted to a nicety; and, by adjusting the nut 20 on the mcmberi. 1 8, the latter may be supported so crablvsomewhat resilient, supports the 29 Lightly on its seat over the opening (l o0 against the' tension of its spring-32.

In priming the motor,'on starting, the rod aid'ftlie valve has to be liftedv onlyv th-rtthe lever 27 which, as above stated, is

.-15 is pressed 'downwardly against the tension of the spring 423 andits lower end moved into vcontact with the cross-bar or plate 11 which connects the float 10'to the valve-stem 9 and the valve 8 is opened'and the oil iows into the reservoir 3a until it reaches a level with the openings 17 in the tubtilar portion 1 6 of the rod 1,5.r The oil may reach a 'level with the'bo-ttom-ofl the. partition 12 and iiow through the rent openings 12EL in said partition and into the chamber 2; or, in case .the oildoes not reach "Obviously, theldevice admits of consider- W y able modification Without departing from' our invention. Therefore, We do not Wish to be limited to the specific construction and arrangement shown. What we claim is:

1. A carbureter comprisinga casingq-i-` lvided by two Asubstantially horizontal par-`` tit-ions to provide a mixing eh amber,.an. air

chamber below said inixing4 chamber, and

an oil reservoir below said air chamber, said mixing' ohamber'having a separate air inlet opening and a valve normally closing said inlet opening, the upper partition having a central opening and a depending annular portion surrounding `said central opening and constituting an carbureting chamber, and said low'er partition having a central depression constituting an oil receptacle int/o which said carbureting chamexte'ndsa central-projection on the upper lface "ot the bottom of said oil receptacle,

.saidaprojection having a vert-ical bore there through, a vertically movable rod whose lower portion is bored axially to constitute an oil supply tube and fitted through the bore in said projection end communicating with lsaid oil reservoir, the vtubular portion of said rod havinga multiplicity of perforat-ions adapted, to communicate with said carbureting chambeig'and the upper end portion ot' said rod projecting through the top of the casing, an adjustable and resilient device for Supporting number of the perforations in its tubular portion uncovered above said projc'ction of the oil receptacle, and a lever connection between said adjustable supporting device and the air valve for `said mixing chamber whereby, when said air vajje is opened, the supporting device is lifted and the rod thereby moved to uncover a greater numberr of the perforations in its tubular portion.

A carbureter comprising a casing divided by two substantially horizontal partitions to 'provide a mixing chamber, an air chamber below said mixingv chamber, and an oil reservoir below' saidv air chamber,

the u i ier vartition havin@r a central o ening.1r and a depending annularliange surroundingV said central opening and constituting' a carbureting chamber, lthe 'lower partition having a centraldepression constituting an oilreceptacle into which 4the carliureting chamber projectsya vertically movable rod whose lower portion is tubular to constitute an oil supply tube, said rod being' slidably fitted through the bottom of said oil receptacle and communicating with said-oil reservoir, said tube. having a multiplicity oit perforations adapted `to communicate with said carbureting chamber. an outwardly opening supply valve in the bottom ct said oil receptacle beneath the end of said oil tube, and a resilient and adjustable support 'tor said rod whereby the latter may be' liuiljusted to uncover a desired number of the perforations in its tubular portlon and also depressed the inlet valve of said oil reservoir.

3. A carbureter comprising a low; said mixing chamber and open at its topto continuous.communication with the latter, an air chamber 'surrounding said carbureting chamber and open to continuous' communication therewith at the bottom ofthe latter, la vertically movable oil pipe having a multiplicity of pertorations adaptedto 'communicate with said caibureting,r chamber-, means for coveriific; said. perforations, vertically movable, adjustable ing chamber the rod with a desirablev ber,

to effect the opening ot mixing' a chamber. a carbureting chamber located 'oe-- supporting nieans'tor said oil pipe adapted to yieldingly hold it with a desired number of its'perforations uncovered,- said mix-` having an auxiliary air inlet, an inwardly open suction valve controlling said auxiliary air inlet, and a lever connection between said valve andsaid supporting means for the oil tube whereby the oil tube is raised to uncover its perfora- `tions proportionately` to the distance said valve is raised.

4."A carbureter comprising a-vmixing chamber, .a ca-rbureting chamber located below said mixing chamber and open at its 4top to continuous communication with the latter, an air chamber surrounding said carbureting chamber and open to continuous -communicati'on therewith at the bottom of the latter, a vertically movable oil pipe having a .multiplicity of perforations adapted to communicate with said carbureting chamadjustable and resilient supporting means for said oil pipe adapted to normally ahold it with a desired number of its perforations uncovered, said means comprising .a verticallyv adjustable support, a spring in terposed between said support and a stop on said oil pipe, and a vertically adjustable member on said support adapted to engage said'stop on the oil pipe to resist the action of said spring. l

A carburetor comprising a mixing chamber. a carbureting chamber located below said mixing chamber and open atits top to continuous communication with the latter.` an air chamber surrounding said car buretingz chamber and' open to continuous'- communication therewith at the bottom of the la'ttensaid mixing chamber havingfan auxiliary air inlet, anv inwardly opening suction valve controlling said auxiliary air inlet, a vertically movable oil pipe having a multiplicity of pertorations adapted to communicate with said carburet-ing chamber, said oil. pipelbeing slidably fitted in a bore so that any desired number of its perforations may be opened to communication with the carbureting chamber, vertically adjustable and resilient means for supporting said oil pipe, said means comprisingv a vertically adjustable supportthrough which the pipe slides, a 'spring interposed between said support and a stop on said pipe, and a vertically adjustable member on-said support adapted to contact with the stop and 6. A carbureter comprising a mixing` chamber, a. carbureting'chamber located below said mixing chamber y and openatitsv top to continuous communication with the latter, anair chambensurroundmg said carsaid valve which-controls inlet, a vertically movable oil pipe having amultiplicity of perforations adapted to communicate with said carbureting chamber,A

' said oil pipe being slidably Vfitted in a bore so that any desired number of its perforations may 'be opened to communication .with the carbureting chamber, vertically adjustable and resilient means for supporting said 'oil pipe, vsaid means comprismg a vertically adjustable support through which the pipe slides, a spring interposed between said support andl a stop on `saidpipe, and a vertically adjustable member on said support day of February, 1911.

4 adapted to :engage said stop, a substantially horizontal resilient lever member pi'voted at one end and secured at its opposite end to the valve which controls said lauxiliary air inlet, the middle portion of 'said lever member being secured to' said-,vertically ladjustable .supporting member forthe loil( pipe7 a spring' acting against said inwardly open ing air valve, 'and means'for varying the tension of said spring. i i Y Signed 4at St. Louis, Missouri, 'this418th WILLIAM F'. ROTHE.' EARLEE. CULP.

lVitnesses: v

G. A. PENNI'NGTON,'v M. A. Siinn'roN. 1"' 

